Apparatus for attaching stay-cords to buttonhole-pieces.



1T0. 888,272. PATENTED MAY19, 1908.

M. 0. THAYER. APPARATUS FOR ATTACHING STAY GORDS T0 BUTTONHOLE PIECES.

APPLICATION I'I LBD MAB. 4, 1908.

ton-holes when UNITED srnri s gnnr OFFICE.

MAYNARD G. THAYER, OF MANCHESTER, NEW HAMPSHIRE, ASSIGNOR TO THE REEGE BUTTON-HOLE MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

Specification of Letters Patent.

Patented May 19, 1908.

Application filed March 4, 1908. Serial No. 419,130.

ieces by means of a cords to button-hole blind-stitch, where y the cord and the stitchingwhich secures it in place will be invisible at the opposite side of the work. The

stay-cord above referred to isattached to the under-side of a button-hole piece adjacent the e e end of a series of buttonholes formed thereimto strengthen the butsubjected to strains at the eye, and heretofore such stay-cord has been tically reciprocating attached and held in place by through and through stitching, of the work.

In my present invention I have provided a fixed guide through which the stay-cord is delivered to the sti'tch-formin mechanism, at the under-side of the wor which shows at the face the work just before the needle penetrates the same, the needle point entering and emergingfrom the same side of the work, producing a blind-stitch. 4

I have herein shown my invention applied .to a sewing-machine having work-bending means and stitch-forming mechanism substantially as shown. in United- States Patent granted to John Reece July 11, 1889.

of a sufficientportion of a sewing-machine such as is illustrated in said patent, with my invention applied thereto, the cover-plate being removed and the overhanging arm omitted; Fig. 2 is an end view of the machine, with the casing broken out and some of the parts insection; Fig. 3 is an under-side view of a button-hole iece with the stay-cord applied thereto by lind-stitchin The'bed-plate A, main sha t A the verbender A", Fig. 2, the groove a in'the throat-plate a, held in place foot B, the

ed under the need said guidebeing'located adjacent means which bend ing. Figure 1 of the drawin is a top plan view on the'bed-plate by screws a the resserreci rocating eye-pointe needle a secured to t e horizontal needle-bar (1 having its bearings in a yoke a mounted on pivots a", a Fi 2, the link I) pivotally connecting the needle-bar with a disk I) on the main shaft A the needle-guide b falling in a slot in the bottom of the groove 0 of the throat-plate by the cob ration of the cam-shaped periphery of the isk b with a spring 5 acting u on a spring-arm 8 extend- F -guide, and the shuttle 0, see dotted lines Fig. 1, to catch the loop of needle-thread, may be and are all substan tially as in the above-mentioned patent and operate as therein set forth. The feed-bar ii is of the fourmotion type, engaging the under-side of the work, and being actuated in the usual manner from cams, not shown, on the shaft A rising and The work is fed in the direction of the longitudinal reciprocation of the needle, as in the ender A acts upon the work to form a'bend therein in the groove a of the throat-plate, the needle entering the bent work first atone and then at the other side of the stay-cord, and to eflect this lateral vibration of the needle a link a is connected at one end to the yoke a and at its other end the link cooperates with a block 21 which enters a groove in a pivoted arm c, said arm having a suitable stud which coo erates with the grooves of a double-grooved switch-cam e Fig. 1, all as in the Reece patent. By the specified means the needle point enters the work on alternate thrusts, at opposite sides of the cordwhich is delivered as will be described, so that the said cord is fastened in place by blind stitch- I will now describe the guide for directing the stay-cord so that it can be laid along the under face of the work and delivered at a point close to the work-bending means, so

that the needle on alternate thrusts will penetrate the bent work at opposite sides of the cord, in order to attach stitching to the work.

Upon the cover plate 30 of the machine, held in place by a screw 32, Fig. 1, in front of the bender A I mount a ing the same fixedly yet adjustably in place the same by blindby screws 32?, Fig. 1, the end of the plate flat plate 31, holdj 105 -patent referred to, and the descent of the near the groove a being beveled or convergmg to substantially a point,- at 33.

Y Upon the pointed end of the plate I rigidly mount atubular guide34, having its delivery end preferably slightly rounded oil or beveled, as alt-'35, Fig. 2, the uide'being face of the Work. The guide, by delivering the cord at the bending point and With proper relation to the movements of the needle, enables the operator to control the 'movement of the work as it is fed in the di reotion of the length of'the needle, so that the stay-cord Will always be laid at the roper point to be stitched to the work, ack of the guide 34 and in alinement therewith I mount a tubular eye 38, through which the cord is threaded before it enters the guide, and a grooved sheave 323 is rotatably mounted on the plate-3L substantially tangential to the line of. feed of the cord,"to

direct the latter from the side eye at and to.

the eye 38. The guide and eye-38 could be made as 'a continuous tube, but it is easier to thread up by making the two parts sepa rate, as I have hereinshown.

. In Fig. 3 1 have shown a button-hole piece with a series of button-holes w, and the stay cord 36 .isfshown'as secured to the piece by the-blind stitching 37 close to the eyeends of the button-holes, to strengthen them of the button-hole piece is shown in Fig. 3, the stay-cord and stitching holding it inv place being invisible from the face of the Work. v

Having fully described my invention,what I claim as new and desire to secure by Letters Patent is 1 In asewing-machine, stitch-forming mechanism, including longitudinallyreciprocating needle laterally vibrated on alternate thrusts, means to intermittingly engage andiorrn a transverse bend in the Work prior to each thrust o'f'the needle, an elongated cord-guide parallel to the longitudinal path of movement of the needle and having its deliver end adjacent the bending means, to deliver a stay-cord thereto and to the stitch-forming mechanism, at the underside of the work, and a directing eye for the cord in front of and alined with the guide.

2. A stay-cord guide for button-hole finishing machines, comprising a plate adapted to be fixedly secured in lace, a tubular guide rigidly mounted t iereon, through which the stay-cord passes and from which it is delivered, and a grodved sheave rotatably mounted on the blat'e with its eriphery tangential tothe tubular guide, t e cord drawing around the sheave as it passes to the guide.

in testimony whereof, I have signed my name-to this specification, in the presence of twe subscribing Witnesses.

MAYIULRD C. THAYER.

l itnesses Lrzzrn HARVEY, CHARLES D. BARNABD. 

